2-5V dropped to 3.3V

The BL9198 is designed for portable RF and 
wireless applications with demanding performance and space requirements. The BL9198 
performance is optimized for battery-powered 
systems to deliver ultra low noise and low 
quiescent current. Regulator ground current 
increases only slightly in dropout, further 
prolonging the battery life. The BL9198 also 
works with low-ESR ceramic capacitors, 
reducing the amount of board space 
necessary for power applications, critical in 
hand-held wireless devices. The BL9198 
consumes less than 0.01µA in shutdown 
mode and has fast turn-on time less than 
50µs. The other features include ultra low 
dropout voltage, high output accuracy, 
current limiting protection, and high ripple 
rejection ratio. Available in the 5-lead SC-70 
and SOT-23 packages. 

FEATURES
Ultra-low Noise for RF Application 
Ultra-Fast Response in Line/Load 
Transient 
<0.01µA Standby Current When 
Shutdown. 
Low Dropout:210mV@300mA 
Wide Operating Voltage Ranges:2V to 
6V 
TTL-logic-Controlled Shutdown Input 
Low Temperature Coefficient 
Current Limiting Protection 
Thermal Shutdown Protection 
Only 1µF Output Capacitor Required for 
Stability 
High Power Supply Rejection Ratio 
Custom Voltage Available 
Fast output discharge 
Available in 5-Lead SOT-23 and SC-70 
Package